Question

[Đoàn Minh Huyền]

Rút gọn : 11.2-11

                 33.2

So sánh : 19   Và. 81     

                20        112

Answer 1

[van tien so]

Rút gọn :\(\frac{11,2-11}{33,2}\)=\(\frac{0,2}{165\times0,2}\)=\(\frac{1}{165}\)

So sánh: 

\(\frac{19}{20}\)=\(\frac{19\times28}{20\times28}\)= \(\frac{532}{560}\)

\(\frac{81}{112}\)= \(\frac{81\times5}{112\times5}=\)\(\frac{405}{560}\)

 Vì \(\frac{532}{560}>\frac{405}{560}\)\(\Rightarrow\)\(\frac{19}{20}>\frac{81}{112}\)